Defra (Department for Environment, Foods, and Rural Affairs) is a UK Government Department with properties all over the UK.
The pilots were conducted at the York and Worcester sites and delivered a average saving of 11% with payback in 32 weeks. Annual CO2 emissions were reduced by 440 tonnes a year.
How does M2G deliver CO2 savings?
The M2G is an intelligent boiler load optimiser which improves the efficiency of each individual boiler regardless of age and size by removing “dry cycling”, an inherent problem found in over 80% of commercial boilers.
M2G is retro-fitted to each boiler and monitors the temperature of the water in the flow and return every 10 seconds, enabling the M2G to analyse the temperature losses from the boiler. The M2G calculates whether the temperature loss is caused by a genuine heating demand or from standing losses i.e. temperature losses through the boiler casing and flue. When the boiler tries to fire as a consequence of the standing losses the M2G will prevent the boiler from firing resulting in reduced energy consumption.
M2G’s ability to remove dry cycling within each boiler results in no changes to the boiler’s designed set points or impacts to ambient room temperatures. This approach eradicates previous control methods of using fixed time delays or predictive firing patterns.
M2G complements and integrates with existing building controls by identifying any changes to the boilers set point from building management systems or additional controls such as weather compensation.